WGBH Radio's Margery Eagan ( @MargeryEagan), BishopAccountability.org's Anne Barrett Doyle (@barrett_doyle) and Boston College's Thomas Groome take up Francis' speech to Congress. 

Defense Attorney Barry Scheck ( @barryscheck) talks wrongful convictions. 

And WGBH's Cristina Quinn ( @cristinatquinn) experiences anti-gravity on a treadmill.